SFI SYSTEM(w/ Canister Pump Module), Diagnostic DTC:P00AA11, P011011

DTC Code DTC Name
P00AA11 Intake Air Temperature Sensor 1 Bank 2 Circuit Short to Ground
P011011 Intake Air Temperature Sensor 1 Bank 1 Circuit Short to Ground

DESCRIPTION

B006CLRE01

The intake air temperature sensor, mounted on the mass air flow meter sub-assembly, monitors the intake air temperature. The intake air temperature sensor has a built-in thermistor with a resistance that varies according to the temperature of the intake air. When the intake air temperature is low, the resistance of the thermistor increases. When the temperature is high, the resistance drops. These variations in resistance are transmitted to the ECM as voltage changes (see Fig. 1).

The intake air temperature sensor is powered by a 5 V supply from the THA terminal of the ECM, via resistor R.

Resistor R and the intake air temperature sensor are connected in series. When the resistance value of the intake air temperature sensor changes, according to changes in the intake air temperature, the voltage at terminal THA also varies. Based on this signal, the ECM increases the fuel injection volume when the engine is cold to improve driveability.

Tech Tips

When DTC P00AA11 or P011011 is stored, the ECM enters fail-safe mode. During fail-safe mode, the intake air temperature is estimated to be 20°C (68°F) by the ECM. Fail-safe mode continues until a pass condition is detected, and the engine switch is then turned off.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory Note
P00AA11 Intake Air Temperature Sensor 1 Bank 2 Circuit Short to Ground The intake air temperature sensor (bank 2) output voltage is less than 0.176 V for 0.5 seconds or more (1 trip detection logic).

  • Short in intake air temperature sensor (bank 2)

  • Intake air temperature sensor (bank 2) (mass air flow meter sub-assembly)

  • ECM

 Comes on DTC stored SAE: P00AC
P011011 Intake Air Temperature Sensor 1 Bank 1 Circuit Short to Ground The intake air temperature sensor (bank 1) output voltage is less than 0.176 V for 0.5 seconds or more (1 trip detection logic).

  • Short in intake air temperature sensor (bank 1) circuit

  • Intake air temperature sensor (bank 1) (mass air flow meter sub-assembly)

  • ECM

 Comes on DTC stored SAE: P0112

Tech Tips

When a DTC is output, check the Data List item "Intake Air Temperature B1S1 and Intake Air Temperature B2S1" using the GTS.

Click here

DTC No. Intake Air Temperature B1S1 or Intake Air Temperature B2S1 Malfunction
P00AA11 Higher than 128°C (262°F) Short to ground in THA2 circuit
P011011 Short to ground in THA circuit

If the Data List displays a normal value, the normal value may be due to a temporary recovery from the malfunction condition. Check for intermittent problems.

MONITOR DESCRIPTION

The ECM monitors the sensor voltage and uses this value to calculate the intake air temperature. When the sensor output voltage deviates from the normal operating range, the ECM interprets this as a malfunction in the intake air temperature sensor (mass air flow meter sub-assembly) circuit, illuminate the MIL and stores a DTC.

Example:

If the intake air temperature sensor output voltage is less than 0.176 V for 0.5 seconds or more, the ECM will illuminate the MIL and store this DTC.

MONITOR STRATEGY

Frequency of Operation Continuous

CONFIRMATION DRIVING PATTERN


  1. Connect the GTS to the DLC3.

  2. Turn the engine switch on (IG).

  3. Turn the GTS on.

  4. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).

  5. Turn the engine switch off and wait for at least 30 seconds.

  6. Turn the engine switch on (IG).

  7. Turn the GTS on.

  8. Wait 0.5 seconds or more.

  9. Enter the following menus: Powertrain / Engine / Trouble Codes.

  10. Read the pending DTCs.

    Tech Tips


    • If a pending DTC is output, the system is malfunctioning.

    • If a pending DTC is not output, perform the following procedure.

  11. Enter the following menus: Powertrain / Engine / Utility / All Readiness.

  12. Input the DTC: P00AA11 or P011011.

  13. Check the DTC judgment result.

    GTS Display Description
    NORMAL

    • DTC judgment completed

    • System normal
    ABNORMAL

    • DTC judgment completed

    • System abnormal
    INCOMPLETE

    • DTC judgment not completed

    • Perform driving pattern after confirming DTC enabling conditions

    Tech Tips


    • If the judgment result is NORMAL, the system is normal.

    • If the judgment result is ABNORMAL, the system is malfunctioning.

WIRING DIAGRAM

Refer to DTC P010012.

Click here

CAUTION / NOTICE / HINT

Tech Tips


  • Read Freeze Frame Data using the GTS. The ECM records vehicle and driving condition information as Freeze Frame Data the moment a DTC is stored. When troubleshooting, Freeze Frame Data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

  • Bank 1 refers to the bank that includes the No. 1 cylinder*.

    *: The No. 1 cylinder is the cylinder which is farthest from the transmission.

  • Bank 2 refers to the bank that does not include the No. 1 cylinder.

    DTC Suspected Area
    P011011 Bank 1
    P00AA11 Bank 2

PROCEDURE


  1. READ VALUE USING GTS (CHECK FOR SHORT IN WIRE HARNESS)

    B0069TQC03
    *1 Mass Air Flow Meter Sub-assembly
    *2 ECM
    *a Bank 1
    *b Bank 2

    1. Disconnect the mass air flow meter sub-assembly connector.

    2. Connect the GTS to the DLC3.

    3. Turn the engine switch on (IG).

    4. Turn the GTS on.

    5. Enter the following menus: Powertrain / Engine / Data List / Intake Air Temperature B1S1 or Intake Air Temperature B2S1.


      Powertrain > Engine > Data List
      Tester Display
      Intake Air Temperature B1S1
      Intake Air Temperature B2S1

    6. According to the display on the GTS, read the Data List.

      OK
      GTS Display Specified Condition
      Intake Air Temperature B1S1 -40°C (-40°F)
      Intake Air Temperature B2S1

      Tech Tips

      Perform "Inspection After Repair" after replacing the mass air flow meter sub-assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE MASS AIR FLOW METER SUB-ASSEMBLY Click here

    NG

  2. CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER SUB-ASSEMBLY - ECM)


    1. Disconnect the mass air flow meter sub-assembly connector.

    2. Disconnect the ECM connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      D17-4 (THAR) or D1-81 (THA) - Body ground and other terminals Always 10 kΩ or higher
      D16-4 (THA) or D1-79 (THA2) - Body ground and other terminals Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE ECM Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR